[the Arrow]. So called from the rapidity of its current. Hiddekel is “The Dekel,” or Diglath, a Semitic corruption of Tigra, Medo-Persic for arrow (Gen. ii. 14.)
“Flumini, a celeritate qua defluit Tigri nomen est; quia Persica lingua, tigrim sagittam appellant.” —Quintus Curtius.